I just ordered my menstrual cup last month and used my lunette cynthia model 2 for the first time this cycle. While it worked wonderfully (ie. no leakage, was able to insert and remove no problem, trimmed to the right length), I did feel quite a bit of pressure on my vaginal walls, making it quite uncomfortable. After lurking here for some time and reading different questions and responses, I suspect that the lunette cynthia may be a little too firm for me. I'm trying to figure out what cup I should try next. Any suggestions for softer, yet similar cups?

Yes, the large Lunette is a firm cup. Firmness has its pluses and minuses. Try squishing it around in your hands for a while. That might soften it up a little. If not, use the size charts found at http://sizecharts.livejournal.com/ or others at the Community FAQ to compare its dimensions to other brands and then pick another that is similar (or not.) Also take shape into consideration... pointy, blunt, flared rim, etc.

Edited to add: But don't be in a rush to replace it yet. Get through a couple more cycles with it. You might wind up liking it after all once your body gets used to it.

The Rainbow/Monzcare R-Cup is pretty much identical in the body (rounded stem, though, which I MUCH prefer to the pokey flat-tab stems) but is extremely soft. It could be TOO soft for you, even (I need them as soft as humanly possible) but they are cheap enough on Ebay and Amazon that it's worth a shot. Plus, the smalls are shaped like the L Lunettes and don't have the same weird shape as the small Lunettes.